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graphics.c
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graphics.c
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#include <stdlib.h>
#include <stdio.h>
//#include <fsys.h>
#include "graphics.h"
#include "display.h"
inline uint16_t _abs_s16(int16_t inVal) { return (inVal >= 0 ? inVal : -inVal); }
inline gfx_color gfx_color_rgb(uint8_t inRed, uint8_t inGreen, uint8_t inBlue) {
return ((inRed & 0xF8) << 8) | ((inGreen & 0xFC) << 3) | ((inBlue & 0xF8) >> 3);
}
inline gfx_color gfx_color_rand(uint8_t inRed, uint8_t inGreen, uint8_t inBlue) {
return gfx_color_rgb((inRed + (rand() % (256 - inRed))), (inGreen + (rand() % (256 - inGreen))), (inBlue + (rand() % (256 - inBlue))));
}
gfx_texture gfx_frame_buffer = { NULL, display_width, display_height };
gfx_texture* gfx_render_target = &gfx_frame_buffer;
bool gfx_init() {
display_init();
gfx_frame_buffer.address = display_addr();
gfx_frame_buffer.width = display_width;
gfx_frame_buffer.height = display_height;
return true;
}
void gfx_term() {
gfx_frame_buffer.address = NULL;
}
bool gfx_render_target_set(gfx_texture* inTexture) {
if(inTexture == NULL) {
gfx_render_target = &gfx_frame_buffer;
return true;
}
if((inTexture->width & 0xF) != 0)
return false;
gfx_render_target = inTexture;
return true;
}
void gfx_render_target_clear(gfx_color inColor) {
uint32_t tempPixelColor = (inColor << 16) | inColor;
uint32_t* tempLineStart = (uint32_t*)gfx_render_target->address;
uint32_t* tempBlockEnd;
tempBlockEnd = (uint32_t*)((uintptr_t)gfx_render_target->address + (gfx_render_target->width * gfx_render_target->height * 2));
while(tempLineStart < tempBlockEnd) {
*(tempLineStart++) = tempPixelColor;
*(tempLineStart++) = tempPixelColor;
*(tempLineStart++) = tempPixelColor;
*(tempLineStart++) = tempPixelColor;
}
}
void gfx_render_target_swap() {
if(gfx_render_target != &gfx_frame_buffer)
return;
display_flip();
gfx_frame_buffer.address = display_addr();
}
gfx_texture* gfx_tex_load_tga(const char* inPath) {
if(inPath == NULL)
return NULL;
FILE* tempFile = fopen(inPath, "rb");
if(tempFile == NULL)
return NULL;
uint8_t tga_ident_size;
uint8_t tga_color_map_type;
uint8_t tga_image_type;
uint16_t tga_color_map_start;
uint16_t tga_color_map_length;
uint8_t tga_color_map_bpp;
uint16_t tga_origin_x;
uint16_t tga_origin_y;
uint16_t tga_width;
uint16_t tga_height;
uint8_t tga_bpp;
uint8_t tga_descriptor;
fread(&tga_ident_size, 1, 1, tempFile);
fread(&tga_color_map_type, 1, 1, tempFile);
fread(&tga_image_type, 1, 1, tempFile);
fread(&tga_color_map_start, 2, 1, tempFile);
fread(&tga_color_map_length, 2, 1, tempFile);
fread(&tga_color_map_bpp, 1, 1, tempFile);
fread(&tga_origin_x, 2, 1, tempFile);
fread(&tga_origin_y, 2, 1, tempFile);
fread(&tga_width, 2, 1, tempFile);
fread(&tga_height, 2, 1, tempFile);
fread(&tga_bpp, 1, 1, tempFile);
fread(&tga_descriptor, 1, 1, tempFile);
gfx_texture* tempTexture = (gfx_texture*)malloc(sizeof(gfx_texture) + (tga_width * tga_height * 2));
if(tempTexture == NULL) {
fclose(tempFile);
return NULL;
}
tempTexture->address = (void*)((uintptr_t)tempTexture + sizeof(gfx_texture));
tempTexture->width = tga_width;
tempTexture->height = tga_height;
uintptr_t i;
uint8_t tempColor[3];
uint16_t* tempTexPtr = (uint16_t*)tempTexture->address;
for(i = 0; i < (tga_width * tga_height); i++) {
fread(&tempColor[2], 1, 1, tempFile);
fread(&tempColor[1], 1, 1, tempFile);
fread(&tempColor[0], 1, 1, tempFile);
tempTexPtr[i] = gfx_color_rgb(tempColor[0], tempColor[1], tempColor[2]);
}
fclose(tempFile);
return tempTexture;
}
bool gfx_tex_save_tga(const char* inPath, gfx_texture* inTexture) {
if((inPath == NULL) || (inTexture == NULL) || (inTexture->address == NULL))
return false;
FILE* tempFile = fopen(inPath, "wb");
if(tempFile == NULL)
return false;
uint8_t tga_ident_size = 0;
uint8_t tga_color_map_type = 0;
uint8_t tga_image_type = 2;
uint16_t tga_color_map_start = 0;
uint16_t tga_color_map_length = 0;
uint8_t tga_color_map_bpp = 0;
uint16_t tga_origin_x = 0;
uint16_t tga_origin_y = 0;
int16_t tga_width = inTexture->width;
int16_t tga_height = inTexture->height;
uint8_t tga_bpp = 24;
uint8_t tga_descriptor = 0x20;
fwrite(&tga_ident_size, 1, 1, tempFile);
fwrite(&tga_color_map_type, 1, 1, tempFile);
fwrite(&tga_image_type, 1, 1, tempFile);
fwrite(&tga_color_map_start, 2, 1, tempFile);
fwrite(&tga_color_map_length, 2, 1, tempFile);
fwrite(&tga_color_map_bpp, 1, 1, tempFile);
fwrite(&tga_origin_x, 2, 1, tempFile);
fwrite(&tga_origin_y, 2, 1, tempFile);
fwrite(&tga_width, 2, 1, tempFile);
fwrite(&tga_height, 2, 1, tempFile);
fwrite(&tga_bpp, 1, 1, tempFile);
fwrite(&tga_descriptor, 1, 1, tempFile);
uintptr_t i;
uint8_t tempColor[3];
uint16_t* tempTexPtr = (uint16_t*)inTexture->address;
for(i = 0; i < (tga_width * tga_height); i++) {
tempColor[0] = ((tempTexPtr[i] >> 8) & 0xF8);
tempColor[0] |= (tempColor[0] >> 5);
tempColor[1] = ((tempTexPtr[i] >> 3) & 0xFC);
tempColor[1] |= (tempColor[1] >> 6);
tempColor[2] = ((tempTexPtr[i] << 3) & 0xF8);
tempColor[2] |= (tempColor[2] >> 5);
fwrite(&tempColor[2], 1, 1, tempFile);
fwrite(&tempColor[1], 1, 1, tempFile);
fwrite(&tempColor[0], 1, 1, tempFile);
}
fclose(tempFile);
return true;
}
void gfx_point_draw(int16_t inX, int16_t inY, gfx_color inColor) {
uint16_t* tempPtr = (uint16_t*)(gfx_render_target->address);
tempPtr[(inY * gfx_render_target->width) + inX] = inColor;
}
void gfx_line_draw(int16_t inX0, int16_t inY0, int16_t inX1, int16_t inY1, gfx_color inColor) {
int16_t tempDx = inX1 - inX0;
int16_t tempDy = inY1 - inY0;
bool tempSteep = (_abs_s16(tempDy) >= _abs_s16(tempDx));
if(tempSteep) {
inX0 = inX0 ^ inY0;
inY0 = inX0 ^ inY0;
inX0 = inX0 ^ inY0;
inX1 = inX1 ^ inY1;
inY1 = inX1 ^ inY1;
inX1 = inX1 ^ inY1;
tempDx = inX1 - inX0;
tempDy = inY1 - inY0;
}
int16_t tempXStep = 1;
if(tempDx < 0) {
tempXStep = -1;
tempDx = -tempDx;
}
int16_t tempYStep = 1;
if(tempDy < 0) {
tempYStep = -1;
tempDy = -tempDy;
}
int16_t tempTwoDy = tempDy * 2;
int16_t tempTwoDyTwotempDx = tempTwoDy - (tempDx * 2);
int16_t tempErr = tempTwoDy - tempDx;
uint16_t* tempPtr = (uint16_t*)gfx_render_target->address;
int16_t tempX, tempY;
if(tempSteep) {
for(tempX = inX0, tempY = inY0; tempX != inX1; tempX += tempXStep) {
tempPtr[(tempX * gfx_render_target->width) + tempY] = inColor;
if(tempErr > 0) {
tempErr += tempTwoDyTwotempDx;
tempY += tempYStep;
} else
tempErr += tempTwoDy;
}
} else {
for(tempX = inX0, tempY = inY0; tempX != inX1; tempX += tempXStep) {
tempPtr[(tempY * gfx_render_target->width) + tempX] = inColor;
if(tempErr > 0) {
tempErr += tempTwoDyTwotempDx;
tempY += tempYStep;
} else
tempErr += tempTwoDy;
}
}
}
void gfx_rect_draw(int16_t inX, int16_t inY, int16_t inWidth, int16_t inHeight, gfx_color inColor) {
uint16_t* tempBuffer = (uint16_t*)gfx_render_target->address;
uintptr_t i, j;
j = 0;
for(j = inY, i = (inX > 0 ? inX : 0); (i < gfx_render_target->width) && (i < (inX + inWidth)); i++)
tempBuffer[(j * gfx_render_target->width) + i] = inColor;
for(j = (inY + 1); (j < gfx_render_target->height) && (j < (inY + inHeight - 1)); j++) {
if(inX >= 0)
tempBuffer[(j * gfx_render_target->width) + inX] = inColor;
if((inX + inWidth - 1) < gfx_render_target->width)
tempBuffer[(j * gfx_render_target->width) + (inX + inWidth - 1)] = inColor;
}
for(j = (inY + inHeight - 1), i = (inX > 0 ? inX : 0); (i < gfx_render_target->width) && (i < (inX + inWidth)); i++)
tempBuffer[(j * gfx_render_target->width) + i] = inColor;
}
void gfx_rect_fill_draw(int16_t inX, int16_t inY, int16_t inWidth, int16_t inHeight, gfx_color inColor) {
if(inX < 0) {
inWidth += inX;
inX = 0;
}
if(inY < 0) {
inHeight += inY;
inY = 0;
}
uint16_t* tempBuffer = (uint16_t*)gfx_render_target->address;
uintptr_t i, j;
for(j = inY; (j < gfx_render_target->height) && (j < (inY + inHeight)); j++) {
for(i = inX; (i < gfx_render_target->width) && (i < (inX + inWidth)); i++) {
tempBuffer[(j * gfx_render_target->width) + i] = inColor;
}
}
}
void gfx_tri_draw(int16_t inX0, int16_t inY0, int16_t inX1, int16_t inY1, int16_t inX2, int16_t inY2, gfx_color inColor) {
gfx_line_draw(inX0, inY0, inX1, inY1, inColor);
gfx_line_draw(inX1, inY1, inX2, inY2, inColor);
gfx_line_draw(inX2, inY2, inX0, inY0, inColor);
}
void gfx_tex_draw(int16_t inX, int16_t inY, gfx_texture* inTexture) {
if(inTexture == NULL)
return;
uint16_t* tempBuffer = (uint16_t*)gfx_render_target->address;
uint16_t* tempTexture = (uint16_t*)inTexture->address;
int16_t x, y, i, j;
for(j = 0, y = inY; (j < inTexture->height) && (y < gfx_render_target->height); j++, y++) {
for(i = 0, x = inX; (i < inTexture->width) && (x < gfx_render_target->width); i++, x++) {
tempBuffer[(y * gfx_render_target->width) + x] = tempTexture[(j * inTexture->width) + i];
}
}
}
uint16_t gfx_font_width(gfx_texture* inFont, char* inString) {
if((inFont == NULL) || (inString == NULL))
return 0;
uintptr_t i, tempCur, tempMax;
for(i = 0, tempCur = 0, tempMax = 0; inString[i] != '\0'; i++) {
if(inString[i] == '\t')
tempCur += 4;
else if((inString[i] == '\r') || (inString[i] == '\n'))
tempCur = 0;
else
tempCur++;
if(tempCur > tempMax) tempMax = tempCur;
}
tempMax *= (inFont->width >> 4);
return tempMax;
}
uint16_t gfx_font_height(gfx_texture* inFont) {
if(inFont == NULL)
return 0;
return (inFont->height >> 4);
}
void gfx_font_print_char(int16_t inX, int16_t inY, gfx_texture* inFont, char inChar) {
char tempStr[2] = { inChar, '\0' };
gfx_font_print(inX, inY, inFont, tempStr);
}
void gfx_font_print(int16_t inX, int16_t inY, gfx_texture* inFont, char* inString) {
if((inFont == NULL) || (inString == NULL))
return;
uint16_t* tempBuffer = (uint16_t*)gfx_render_target->address;
uint16_t* tempFont = (uint16_t*)inFont->address;
char* tempChar = inString;
int16_t tempX = inX;
int16_t tempY = inY;
uintptr_t i, j, x, y;
for(tempChar = inString; *tempChar != '\0'; tempChar++) {
if(*tempChar == ' ') {
tempX += (inFont->width >> 4);
continue;
}
if(*tempChar == '\t') {
tempX += ((inFont->width >> 4) << 2);
continue;
}
if(*tempChar == '\r') {
tempX = inX;
continue;
}
if(*tempChar == '\n') {
tempX = inX;
tempY += (inFont->height >> 4);
continue;
}
for(j = ((*tempChar >> 4) * (inFont->height >> 4)), y = tempY; (j < (((*tempChar >> 4) + 1) * (inFont->height >> 4))) && (y < gfx_render_target->height); j++, y++) {
for(i = ((*tempChar & 0x0F) * (inFont->width >> 4)), x = tempX; (i < (((*tempChar & 0x0F) + 1) * (inFont->width >> 4))) && (x < gfx_render_target->width); i++, x++) {
tempBuffer[(y * gfx_render_target->width) + x] |= tempFont[(j * inFont->width) + i];
}
}
tempX += (inFont->width >> 4);
}
}
void gfx_font_print_center(int16_t inY, gfx_texture* inFont, char* inString) {
int16_t tempX = (gfx_render_target->width - gfx_font_width(inFont, inString)) >> 1;
gfx_font_print(tempX, inY, inFont, inString);
}
void gfx_font_print_fromright(int16_t inX, int16_t inY, gfx_texture* inFont, char* inString) {
int16_t tempX = inX - gfx_font_width(inFont, inString);
gfx_font_print(tempX, inY, inFont, inString);
}